Should there be a tag for the
index package? Being a rather generic term, it's hard to search for.
There's a tag indexing which covers generic index-related issues. This isn't necessarily appropriate for issues that are specific to one particular package.
There's a tag index with only two questions: How to display index entries on the same line as the text being indexed which is about LaTeX's built-in indexing facilities, and the question I just posted babel and index both redefine \markboth and \markright which is about the
If a tag is warranted, what should it be called? index-package?